Heating apparatus



May 2, 1933.

C. LANGBERG El AL HEATING APPARATUS Filed Aug. 24 1932 Patented May 2, 1933 v UNITED STATES CHRISTIAN LANGIBERG AND CAMPBELL WATHNE, OF STAVANGER, NORWAY HEATING APPARATUS Application filed August 24, 1932, Serial No. 630,314, and in Norway June 26, 1932.

paratus, more particularly to heating apparatus for motor boats, motor cars and other vehicles of the kind wherein exhaust gases of an engine are utilized for heating fresh air and for driving a rotary air motor, prefer- 0 ably a small turbine and by means of the latter a fan which serves for circulating the fresh air to be heated. The object of the invention is to construct a heating apparatus of the above type in such a manner that it may be used also as a cooking or hot plate. With this object in view the casing of the heating apparatus is so constructed that one of its sides, preferably, the front side, may be used as a cooking or hot plate.

Another object of the invention is to si plify and improve the general construction of the heating apparatus.

The accompanylng drawing shows by way of example one construction of the heating apparatus and two modifications of the outer casing of the apparatus.

Fig. 1 is anelevation of the heating apparatus,

Fig. 2 Fig. 1,

Fig. 3 is 'a rear view corresponding to Fig. 1.

Fig.4 is a section on line 44 of Fig. 1.

Fig. 5 is a section on line 5-5 of Fig. 4 drawn to a large scale.

Fig. 6 shows an alternative construction of the casing in front View and Fig. 7 shows a further modification of the casing in front view.

Referring first to Figs-1 to 5, the main casing 1 of the heating apparatus is formed with an internal turbine housing 3 in which is rotatably mounted a turbine 2. Exhaust gases are admitted to the turbine housing 3 by an inlet pipe 5, which, as may be seen from Fig. 5, is of smaller diameter than the depth 'of the casing 1, the depth of the casing 3 being the same as the depth of the main ms is a front view cor-responding to 0 ing 1. The gases, after passing through the turbine 2, escape through clearances between the inlet pipe 5 and the two faces of the easing 1 into an annular space within the casing 1 surrounding the turbine casing 3, and escape from that annular space through an exhaust pipe 6 into the open air or a discharge pipe. The exhaust gases passing through the turbine therefore drive the turbine and at the same time heat the inner chamber of the easing 1. To the rear side of the casing 1 is fixed another casing 7 which serves for the reception of a fan 8 driven by the turbine 2. The saidcasing 7 is provided with an opening 9 for the admission of fresh air to be circulated by the fan 8.- The inner space of the casing 7 serves also as a collector for the heat radiated from or given oil by the rear portion ofthe casing 1. In this. way loss of heat in one direction is avoided. The casing 1 is constructed as a hot plate, the front side of the casing forming a hot plate or cooking plate. 7 The fresh air drawn into the casing 7 by the fan 8 is driven by the fan out through conduits 10 provided in the main casing 1, these conduits being, as shown in Fig. 5, tapering towards the front of the casing. The fresh 7'5 air drawn in by the fan is heated in the interior of the casing 7 and also in the conduits 10, and passes through the latter into the room. It is essential that the bearings for the shaft carrying the fan 8 and the turso bine 2 be so constructed that they be-not affected by .the heat within the apparatus.

For this purposethe shaft 11 carrying the .turbine 2 and-the fan 8 is mounted in two ball bearings 12, 12 which are disposed in a tubular fitting 13 fixed by means of arms 14 to a cover plate 15, which forms the rear wall of the turbine casing 3. The outer end of the tubular fitting 13 is closed by a cap 18. The common shaft 11 of the fan 8 and the turbine 2 passes freely through a bore in the cover plate 15, and leakage along the shaft from the turbine chamber into the casing 7 is effectively prevented by the provision of a plate 17 fixedly mounted upon the shaft. This plate I 17 is, owing to the back pressure of the fan, firmly pressed during the rotation of the fan against the plate 15; Moreover, the pressure between the plates 17 and 15 may be ad'- justcd by means of a nut on the external end lit? of the shaft 11 within the cap 18. Between the inner end of the bearing 12 and the hub 19 of the fan 8 is arranged aspring 20 which regulates the pressure upon the bearing.

In the modification shown in Fig. 6, the fresh air conduits 10 in the main casing are replaced by conduits 10a. 1a denotes the main casing, 7a the rear casing, 5a the admission pipe and 6a the discharge pipe of the exhaust gases.

In the construction shown in Fig. 7, the main casing 16 having an inlet pipe 51) and outlet pipe 6?), and a rear casing 7 b, is so spaced relatively to the rear casing 7 b as to provide an annular clearance 10?) between the rear casing and the main casing through which fresh air flows under the action of the fan.

The improved heating apparatus may, if

. preferred, be used without the rear casing.

, In operation exhaust gases enter the heating" apparatus through the pipe 5, drive the turbine 2 and are discharged through the pipe 6. These gases also heat the main casing, the front side of which may be used as a hot plate. The turbine drives the fan 8 and the latter draws air and passes same through the conduits 10 or 10a or 10?) of the main casing. The fresh air is heated both owing to its passage through the heater" conduits 10 and owing to the fact that the interior space of the rear casing? absorbs all the heat radiated backwards by the heating apparatus.

It may be pointed out that owing to the arrangement of the two ball bearings within a tubular fitting rearwardly projecting from the rear wall of the casing, the inrushing air will'cool the bearings.

We claim:

1. A heating apparatus comprising in combination: a main casing adapted for use as a hot plate; a gas turbine within said main casing; means for admitting a hot driving described.

and heating medium to said casing; means for dischargingsaid hot driving and heating medium'from said casing; a second casing attached to said main casing; a'fan in said second casing; and means for driving said fan by the said gas turbine, substantially as 2. A heating apparatus comprisingin combination: a main casing adapted for use as a hot plate; a gas turbine rotatablymounted in said main casing; means for admitting a hot driving medium to said casing; means for discharging the hot driving medium from said casing; fresh air conduits in said main casing; a second casing attached to the back of said main casing; a fan rotatably mounted in said second casing, said second casing having. openings communicating with the conduits in said main casing and also having an opemng for the admission of fresh air; a common shaft bearing said gas turblne and said fan; and bearings for said common shaft located rearwardly of the said fan, substantially as described.

7 3. A heating apparatus comprising in combination: a main casing; a central chamber in said casing serving as housing for a gas turbine and provided with inlet conduit for the heating and driving medium, said conduit being of smaller depth than the main casing so as to leave a clearance between said conduit and the main casing; an annular chamber within said main casing surrounding the said central chamber and provided with a discharge conduit for the heating and driving medium; a gas turbine rotatably mounted in said central chamber; fresh air conduits arranged in a circle around said gas turbine and passing transversely from one end face of the main casing to the other end face; a second casing detachably fixed to the rear of said main casing and communicating with the said fresh air conduits in the said main casing; and a fan rotatably mounted in said second casing and adapted to be driven by the said gas turbine, substantially as described.

4. A heating apparatus comprising in combination: a main casing; an inlet conduit for supplying a hot driving medium to said casing; a conduit for discharging the hot driving medium from said casing; a gas turbine rotatably mounted in said casing; said casing being constructed to serve as a hot plate; and a detachable second casing adapted to be attached to the rear of said main casing and containing a fan adapted to be driven from said gas turbine, substantially as described.

5. A heatingapparatus comprising in combination: a main casing; a gas turbine'rotatably mounted therein; said main casing having a plane front wall and a plane rear wall and fresh air conduits extending from the rear wall to the front wall; a second casing detachably connected to the rear wall of said main casing and having communication openings for communication with the said fresh air conduits in the main casing; a central chamber in said main casing, said chamber being closed at the rear by'a detachable cover; a fan rotatably mounted in said second casing; a common shaft for the said gas turbine and the said fan extending through the said cover; two ball bearings for carrying said common shaft arranged rearwardly of the said fan and carried by a tubular member which is fixed by arms to said cover, a packing plate fixed to said shaft and co-operating with said cover to prevent leakage from the gas turbine chamber to the second casing; and spring means interposed between the said fan and the bearing adjacent thereto, substantially as described.

6. heating apparatus comprising in comblnatlonz a main casing; a gas turbine rotatably mounted therein; means for supplying to and discharging from said main casing a hot driving medium; said main casing being constructed as a cooking plate; a detachable second casing containing a fan adapted to be driven by the said gas turbine; and communication passages and fresh air conduits for passing air through the second casing and the main casing, substantially as described.

7. A heating apparatus comprising in com bination: a substantially cylindrical main casing having two plane end Walls and a central chamber serving as a housing. for a gas turbine, said central chamber having an inlet conduit for the admission of a hot driving medium; said main casing also having fresh air conduits extending from one end wall to the other and bordered by the peripheral Wall of the said main casing; a detachable second casing adapted to be at tached to the rear Wall of said main casing; a gas turbine in said main casing and a fan in said second casing, said gas turbine and said fan being mounted upon a common shaft, substantially as described. k

8. A heating apparatus comprising in combination: amain casing constructed as a hot plate and containing a gas turbine and provided with inlet andioutlet conduits for a hot driving medium; a detachable casing adapted to be attached to the said main casing and containing a fan; said gas turbine and said fan being mounted upon a common shaft; and two bearings for said common shaft arranged at the rear of said second casing, substantially as described.

CHRISTIAN LANGBERG. CAMPBELL WATHNE. 

